Digitising Film | Natural window backlight vs Huawei P20 Pro Backlight

As I get more and more into using film again, I am learning something new every day. Today, I was trying to digitise some Ilford FP4 film negatives that i had taken yesterday and I was using my Lomography Digitalize 35mm Scanning Mask to hold the film strip over a white screen app on my Huawei P20 Pro. Now, the white light from the Huawei app looks very clean although of course, I knew that there are going to be some issues with colour as it’s unlikely that it’s a high CRI index and besides, I could see some magenta in the digitised images. What I didn’t expect was to be able to capture the actual screen structure, this looks like a patchwork of brush strokes, which was bleeding through the film negative and being captured by my camera. The easiest way to explain this is to show you a zoomed in area of the image, this is 500% zoomed, so that this all makes more sense.

As you can see, the cross hatching obliterates any detail in the image plus it destroys the grain. Now, I hadn’t noticed this previously on other images albeit I was seeing some significant degredation in the image which I put down to camera focusing issues when I took the image. Perhaps not! Now I realise that it is the Huawei that is injecting these artifacts into the image I can start thinking about ways to overcome this. The easiest and cheapest way to create a backlight, although not necessarily the most efficient way, is to use natural light through a window. Now, to get ths perfectly right we are going to need a very flat grey backlight or at the very least, non direct sunlight. That’s not always easy of course, although with the dull weather we have been having here in the UK recently, it’s probably a little easier for us. So, having had a few goes, this next shot, again zoomed in at 500%, is using natural window light to backlight the negatives. The difference is quite stark, far less interference with the base image so more detail.

Where’s this is leading me I dont know to be honest but it’s certainly taking me away from using Huawei P20 Pro as a backlight. I could knife and fork something together to hold my Lomography digitalizer and film against the window and then set up my camera and tripod to capture this this but I don’t feel that this is an ideal solution. I’ll be thinking about this a lot over the next few days so join me again then.